Add labo

Signed-off-by: Kotaro Inoue <k.musaino@gmail.com>

Author: musaprg

labo/basic/structfieldsiterate.zig

@@ -0,0 +1,15 @@
+const std = @import("std");
+
+// https://gist.github.com/travisstaloch/71a7a2bc260997abe06016c619b40bf2
+pub fn main() !void {
+    const U1s = packed struct {
+        a: u1,
+        b: u1,
+        c: u1,
+    };
+
+    const x = U1s{ .a = 1, .b = 0, .c = 0 };
+    inline for (std.meta.fields(@TypeOf(x))) |f| {
+        std.debug.print(f.name ++ " {}\n", .{@as(f.field_type, @field(x, f.name))});
+    }
+}